0.25+(-1/8)-(+7/8)-(+3/4)还有-3-〔-5+(1-3*3/5)/(-2)〕 9又14/15*(-
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0.25+(-1/8)-(+7/8)-(+3/4)

=1/4-1/8-7/8-3/4

=2/8-1/8-7/8-6/8

=-3/2

=-1又1/2

-3-〔-5+(1-3*3/5)/(-2)〕

=-3-[-5+(-4/5)/(-2)〕

=-3-[-5+2/5]

=-3-[-23/5]

=-15/5+23/5

=8/5

=1又3/5

9又14/15*(-15)

=-149/15*15

=-149

-6²*(-1又1/2)²-3²/(1又1/2)三次方*3

=-36*9/4-9/(27/8)*3

=-81-8

=-89

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